http://uk.reuters.com/article/us-britain-eu-negotiations-idUKKBN17R1XJ
https://www.llri.lt/wp-content/uploads/2018/06/Labour-Migration_3.pdf
http://www.radiofree.org/us/why-diemuk-shouldnt-take-a-precise-position-on-the-brexit-negotiations-or-why-britain-is-screwed/
https://www.socialeurope.eu/2017/07/49234/